package com.kongfanyu.springcloud.controller;

import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import com.kongfanyu.springcloud.entities.CommonResult;
import com.kongfanyu.springcloud.entities.Payment;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;

@RestController
@Slf4j
public class CircleBreakerController {

    public static final String SERVICE_URL="http://nacos-payment-provider";

    @Resource
    private RestTemplate restTemplate;

    @RequestMapping("/consumer/fallback/{id}")
    //@SentinelResource("fallback")  //①没有配置
    //@SentinelResource(value = "fallback",fallback = "handlerFallback")//②fallback只负责业务异常:java
    //@SentinelResource(value = "fallback",blockHandler = "blockHandler")//③blockHandler只负责sentinel控制台配置违规,违反配置
    @SentinelResource(value = "fallback",fallback = "handlerFallback",blockHandler = "blockHandler")//④都配置
    //@SentinelResource(value = "fallback",fallback = "handlerFallback",blockHandler = "blockHandler",exceptionsToIgnore = {IllegalAccessException.class})//⑤忽略异常
    public CommonResult<Payment>  fallback(@PathVariable Long id){
        CommonResult<Payment> result = restTemplate.getForObject(SERVICE_URL+"/paymentSQL/"+id,CommonResult.class,id);
        if(id ==4){
            throw new IllegalArgumentException("IllegalArgumentException,非法参数异常.....");
        }else if(result.getData() == null){
            throw new NullPointerException("NullPointerException,该ID没有对应记录，空指针异常");
        }
        return result;
    }
    //本例是fallback: java异常
    public CommonResult handlerFallback(@PathVariable Long id,Throwable e){
        Payment payment = new Payment(id,"null");
        return new CommonResult(4444,"兜底异常方法handlerFallback,exception内容:"+e.getMessage(),payment);
    }
    //处理sentinel配置异常
    public CommonResult blockHandler(@PathVariable Long id, BlockException e){
        Payment payment = new Payment(id,"null");
        return new CommonResult(44455,"blockHandler--sentinel限流，无此流水: blockException "+e.getMessage(),payment);
    }

}
